[deliverable/linux.git] / fs / f2fs / node.h

/*
 * fs/f2fs/node.h
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
/* start node id of a node block dedicated to the given node id */
#define	START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)

/* node block offset on the NAT area dedicated to the given start node id */
#define	NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)

/* # of pages to perform readahead before building free nids */
#define FREE_NID_PAGES 4

/* maximum readahead size for node during getting data blocks */
#define MAX_RA_NODE		128

/* control the memory footprint threshold (10MB per 1GB ram) */
#define DEF_RAM_THRESHOLD	10

/* vector size for gang look-up from nat cache that consists of radix tree */
#define NATVEC_SIZE	64

/* return value for read_node_page */
#define LOCKED_PAGE	1

/* For flag in struct node_info */
enum {
	IS_CHECKPOINTED,	/* is it checkpointed before? */
	HAS_FSYNCED_INODE,	/* is the inode fsynced before? */
	HAS_LAST_FSYNC,		/* has the latest node fsync mark? */
	IS_DIRTY,		/* this nat entry is dirty? */
};

/*
 * For node information
 */
struct node_info {
	nid_t nid;		/* node id */
	nid_t ino;		/* inode number of the node's owner */
	block_t	blk_addr;	/* block address of the node */
	unsigned char version;	/* version of the node */
	unsigned char flag;	/* for node information bits */
};

struct nat_entry {
	struct list_head list;	/* for clean or dirty nat list */
	struct node_info ni;	/* in-memory node information */
};

#define nat_get_nid(nat)		(nat->ni.nid)
#define nat_set_nid(nat, n)		(nat->ni.nid = n)
#define nat_get_blkaddr(nat)		(nat->ni.blk_addr)
#define nat_set_blkaddr(nat, b)		(nat->ni.blk_addr = b)
#define nat_get_ino(nat)		(nat->ni.ino)
#define nat_set_ino(nat, i)		(nat->ni.ino = i)
#define nat_get_version(nat)		(nat->ni.version)
#define nat_set_version(nat, v)		(nat->ni.version = v)

#define inc_node_version(version)	(++version)

static inline void copy_node_info(struct node_info *dst,
						struct node_info *src)
{
	dst->nid = src->nid;
	dst->ino = src->ino;
	dst->blk_addr = src->blk_addr;
	dst->version = src->version;
	/* should not copy flag here */
}

static inline void set_nat_flag(struct nat_entry *ne,
				unsigned int type, bool set)
{
	unsigned char mask = 0x01 << type;
	if (set)
		ne->ni.flag |= mask;
	else
		ne->ni.flag &= ~mask;
}

static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
{
	unsigned char mask = 0x01 << type;
	return ne->ni.flag & mask;
}

static inline void nat_reset_flag(struct nat_entry *ne)
{
	/* these states can be set only after checkpoint was done */
	set_nat_flag(ne, IS_CHECKPOINTED, true);
	set_nat_flag(ne, HAS_FSYNCED_INODE, false);
	set_nat_flag(ne, HAS_LAST_FSYNC, true);
}

static inline void node_info_from_raw_nat(struct node_info *ni,
						struct f2fs_nat_entry *raw_ne)
{
	ni->ino = le32_to_cpu(raw_ne->ino);
	ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
	ni->version = raw_ne->version;
}

static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,
						struct node_info *ni)
{
	raw_ne->ino = cpu_to_le32(ni->ino);
	raw_ne->block_addr = cpu_to_le32(ni->blk_addr);
	raw_ne->version = ni->version;
}

enum mem_type {
	FREE_NIDS,	/* indicates the free nid list */
	NAT_ENTRIES,	/* indicates the cached nat entry */
	DIRTY_DENTS,	/* indicates dirty dentry pages */
	INO_ENTRIES,	/* indicates inode entries */
	BASE_CHECK,	/* check kernel status */
};

struct nat_entry_set {
	struct list_head set_list;	/* link with other nat sets */
	struct list_head entry_list;	/* link with dirty nat entries */
	nid_t set;			/* set number*/
	unsigned int entry_cnt;		/* the # of nat entries in set */
};

/*
 * For free nid mangement
 */
enum nid_state {
	NID_NEW,	/* newly added to free nid list */
	NID_ALLOC	/* it is allocated */
};

struct free_nid {
	struct list_head list;	/* for free node id list */
	nid_t nid;		/* node id */
	int state;		/* in use or not: NID_NEW or NID_ALLOC */
};

static inline void next_free_nid(struct f2fs_sb_info *sbi, nid_t *nid)
{
	struct f2fs_nm_info *nm_i = NM_I(sbi);
	struct free_nid *fnid;

	spin_lock(&nm_i->free_nid_list_lock);
	if (nm_i->fcnt <= 0) {
		spin_unlock(&nm_i->free_nid_list_lock);
		return;
	}
	fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
	*nid = fnid->nid;
	spin_unlock(&nm_i->free_nid_list_lock);
}

/*
 * inline functions
 */
static inline void get_nat_bitmap(struct f2fs_sb_info *sbi, void *addr)
{
	struct f2fs_nm_info *nm_i = NM_I(sbi);
	memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
}

static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
{
	struct f2fs_nm_info *nm_i = NM_I(sbi);
	pgoff_t block_off;
	pgoff_t block_addr;
	int seg_off;

	block_off = NAT_BLOCK_OFFSET(start);
	seg_off = block_off >> sbi->log_blocks_per_seg;

	block_addr = (pgoff_t)(nm_i->nat_blkaddr +
		(seg_off << sbi->log_blocks_per_seg << 1) +
		(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));

	if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
		block_addr += sbi->blocks_per_seg;

	return block_addr;
}

static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
						pgoff_t block_addr)
{
	struct f2fs_nm_info *nm_i = NM_I(sbi);

	block_addr -= nm_i->nat_blkaddr;
	if ((block_addr >> sbi->log_blocks_per_seg) % 2)
		block_addr -= sbi->blocks_per_seg;
	else
		block_addr += sbi->blocks_per_seg;

	return block_addr + nm_i->nat_blkaddr;
}

static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
{
	unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);

	f2fs_change_bit(block_off, nm_i->nat_bitmap);
}

static inline void fill_node_footer(struct page *page, nid_t nid,
				nid_t ino, unsigned int ofs, bool reset)
{
	struct f2fs_node *rn = F2FS_NODE(page);
	unsigned int old_flag = 0;

	if (reset)
		memset(rn, 0, sizeof(*rn));
	else
		old_flag = le32_to_cpu(rn->footer.flag);

	rn->footer.nid = cpu_to_le32(nid);
	rn->footer.ino = cpu_to_le32(ino);

	/* should remain old flag bits such as COLD_BIT_SHIFT */
	rn->footer.flag = cpu_to_le32((ofs << OFFSET_BIT_SHIFT) |
					(old_flag & OFFSET_BIT_MASK));
}

static inline void copy_node_footer(struct page *dst, struct page *src)
{
	struct f2fs_node *src_rn = F2FS_NODE(src);
	struct f2fs_node *dst_rn = F2FS_NODE(dst);
	memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
}

static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
{
	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
	struct f2fs_node *rn = F2FS_NODE(page);

	rn->footer.cp_ver = ckpt->checkpoint_ver;
	rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
}

static inline nid_t ino_of_node(struct page *node_page)
{
	struct f2fs_node *rn = F2FS_NODE(node_page);
	return le32_to_cpu(rn->footer.ino);
}

static inline nid_t nid_of_node(struct page *node_page)
{
	struct f2fs_node *rn = F2FS_NODE(node_page);
	return le32_to_cpu(rn->footer.nid);
}

static inline unsigned int ofs_of_node(struct page *node_page)
{
	struct f2fs_node *rn = F2FS_NODE(node_page);
	unsigned flag = le32_to_cpu(rn->footer.flag);
	return flag >> OFFSET_BIT_SHIFT;
}

static inline unsigned long long cpver_of_node(struct page *node_page)
{
	struct f2fs_node *rn = F2FS_NODE(node_page);
	return le64_to_cpu(rn->footer.cp_ver);
}

static inline block_t next_blkaddr_of_node(struct page *node_page)
{
	struct f2fs_node *rn = F2FS_NODE(node_page);
	return le32_to_cpu(rn->footer.next_blkaddr);
}

/*
 * f2fs assigns the following node offsets described as (num).
 * N = NIDS_PER_BLOCK
 *
 *  Inode block (0)
 *    |- direct node (1)
 *    |- direct node (2)
 *    |- indirect node (3)
 *    |            `- direct node (4 => 4 + N - 1)
 *    |- indirect node (4 + N)
 *    |            `- direct node (5 + N => 5 + 2N - 1)
 *    `- double indirect node (5 + 2N)
 *                 `- indirect node (6 + 2N)
 *                       `- direct node
 *                 ......
 *                 `- indirect node ((6 + 2N) + x(N + 1))
 *                       `- direct node
 *                 ......
 *                 `- indirect node ((6 + 2N) + (N - 1)(N + 1))
 *                       `- direct node
 */
static inline bool IS_DNODE(struct page *node_page)
{
	unsigned int ofs = ofs_of_node(node_page);

	if (f2fs_has_xattr_block(ofs))
		return false;

	if (ofs == 3 || ofs == 4 + NIDS_PER_BLOCK ||
			ofs == 5 + 2 * NIDS_PER_BLOCK)
		return false;
	if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
		ofs -= 6 + 2 * NIDS_PER_BLOCK;
		if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
			return false;
	}
	return true;
}

static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
{
	struct f2fs_node *rn = F2FS_NODE(p);

	f2fs_wait_on_page_writeback(p, NODE);

	if (i)
		rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
	else
		rn->in.nid[off] = cpu_to_le32(nid);
	set_page_dirty(p);
}

static inline nid_t get_nid(struct page *p, int off, bool i)
{
	struct f2fs_node *rn = F2FS_NODE(p);

	if (i)
		return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
	return le32_to_cpu(rn->in.nid[off]);
}

/*
 * Coldness identification:
 *  - Mark cold files in f2fs_inode_info
 *  - Mark cold node blocks in their node footer
 *  - Mark cold data pages in page cache
 */
static inline int is_file(struct inode *inode, int type)
{
	return F2FS_I(inode)->i_advise & type;
}

static inline void set_file(struct inode *inode, int type)
{
	F2FS_I(inode)->i_advise |= type;
}

static inline void clear_file(struct inode *inode, int type)
{
	F2FS_I(inode)->i_advise &= ~type;
}

#define file_is_cold(inode)	is_file(inode, FADVISE_COLD_BIT)
#define file_wrong_pino(inode)	is_file(inode, FADVISE_LOST_PINO_BIT)
#define file_set_cold(inode)	set_file(inode, FADVISE_COLD_BIT)
#define file_lost_pino(inode)	set_file(inode, FADVISE_LOST_PINO_BIT)
#define file_clear_cold(inode)	clear_file(inode, FADVISE_COLD_BIT)
#define file_got_pino(inode)	clear_file(inode, FADVISE_LOST_PINO_BIT)

static inline int is_cold_data(struct page *page)
{
	return PageChecked(page);
}

static inline void set_cold_data(struct page *page)
{
	SetPageChecked(page);
}

static inline void clear_cold_data(struct page *page)
{
	ClearPageChecked(page);
}

static inline int is_node(struct page *page, int type)
{
	struct f2fs_node *rn = F2FS_NODE(page);
	return le32_to_cpu(rn->footer.flag) & (1 << type);
}

#define is_cold_node(page)	is_node(page, COLD_BIT_SHIFT)
#define is_fsync_dnode(page)	is_node(page, FSYNC_BIT_SHIFT)
#define is_dent_dnode(page)	is_node(page, DENT_BIT_SHIFT)

static inline void set_cold_node(struct inode *inode, struct page *page)
{
	struct f2fs_node *rn = F2FS_NODE(page);
	unsigned int flag = le32_to_cpu(rn->footer.flag);

	if (S_ISDIR(inode->i_mode))
		flag &= ~(0x1 << COLD_BIT_SHIFT);
	else
		flag |= (0x1 << COLD_BIT_SHIFT);
	rn->footer.flag = cpu_to_le32(flag);
}

static inline void set_mark(struct page *page, int mark, int type)
{
	struct f2fs_node *rn = F2FS_NODE(page);
	unsigned int flag = le32_to_cpu(rn->footer.flag);
	if (mark)
		flag |= (0x1 << type);
	else
		flag &= ~(0x1 << type);
	rn->footer.flag = cpu_to_le32(flag);
}
#define set_dentry_mark(page, mark)	set_mark(page, mark, DENT_BIT_SHIFT)
#define set_fsync_mark(page, mark)	set_mark(page, mark, FSYNC_BIT_SHIFT)
Commit	Line	Data
0a8165d7	1	/*
39a53e0c JK	2	* fs/f2fs/node.h
	3	*
	4	* Copyright (c) 2012 Samsung Electronics Co., Ltd.
	5	* http://www.samsung.com/
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	/* start node id of a node block dedicated to the given node id */
	12	#define START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)
	13
	14	/* node block offset on the NAT area dedicated to the given start node id */
	15	#define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)
	16
	17	/* # of pages to perform readahead before building free nids */
	18	#define FREE_NID_PAGES 4
	19
39a53e0c JK	20	/* maximum readahead size for node during getting data blocks */
	21	#define MAX_RA_NODE 128
	22
cdfc41c1 JK	23	/* control the memory footprint threshold (10MB per 1GB ram) */
	24	#define DEF_RAM_THRESHOLD 10
	25
39a53e0c JK	26	/* vector size for gang look-up from nat cache that consists of radix tree */
	27	#define NATVEC_SIZE 64
	28
56ae674c JK	29	/* return value for read_node_page */
	30	#define LOCKED_PAGE 1
	31
5c27f4ee CY	32	/* For flag in struct node_info */
	33	enum {
	34	IS_CHECKPOINTED, /* is it checkpointed before? */
	35	HAS_FSYNCED_INODE, /* is the inode fsynced before? */
	36	HAS_LAST_FSYNC, /* has the latest node fsync mark? */
	37	IS_DIRTY, /* this nat entry is dirty? */
	38	};
	39
39a53e0c JK	40	/*
	41	* For node information
	42	*/
	43	struct node_info {
	44	nid_t nid; /* node id */
	45	nid_t ino; /* inode number of the node's owner */
	46	block_t blk_addr; /* block address of the node */
	47	unsigned char version; /* version of the node */
5c27f4ee	48	unsigned char flag; /* for node information bits */
7ef35e3b JK	49	};
7ef35e3b JK	50
39a53e0c JK	51	struct nat_entry {
39a53e0c JK	52	struct list_head list; /* for clean or dirty nat list */
39a53e0c JK	53	struct node_info ni; /* in-memory node information */
	54	};
	55
	56	#define nat_get_nid(nat) (nat->ni.nid)
	57	#define nat_set_nid(nat, n) (nat->ni.nid = n)
	58	#define nat_get_blkaddr(nat) (nat->ni.blk_addr)
	59	#define nat_set_blkaddr(nat, b) (nat->ni.blk_addr = b)
	60	#define nat_get_ino(nat) (nat->ni.ino)
	61	#define nat_set_ino(nat, i) (nat->ni.ino = i)
	62	#define nat_get_version(nat) (nat->ni.version)
	63	#define nat_set_version(nat, v) (nat->ni.version = v)
	64
39a53e0c JK	65	#define inc_node_version(version) (++version)
39a53e0c JK	66
5c27f4ee CY	67	static inline void copy_node_info(struct node_info *dst,
	68	struct node_info *src)
	69	{
	70	dst->nid = src->nid;
	71	dst->ino = src->ino;
	72	dst->blk_addr = src->blk_addr;
	73	dst->version = src->version;
	74	/* should not copy flag here */
	75	}
	76
7ef35e3b JK	77	static inline void set_nat_flag(struct nat_entry *ne,
	78	unsigned int type, bool set)
	79	{
	80	unsigned char mask = 0x01 << type;
	81	if (set)
5c27f4ee	82	ne->ni.flag \|= mask;
7ef35e3b	83	else
5c27f4ee	84	ne->ni.flag &= ~mask;
7ef35e3b JK	85	}
	86
	87	static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
	88	{
	89	unsigned char mask = 0x01 << type;
5c27f4ee	90	return ne->ni.flag & mask;
7ef35e3b JK	91	}
7ef35e3b JK	92
88bd02c9 JK	93	static inline void nat_reset_flag(struct nat_entry *ne)
	94	{
	95	/* these states can be set only after checkpoint was done */
	96	set_nat_flag(ne, IS_CHECKPOINTED, true);
	97	set_nat_flag(ne, HAS_FSYNCED_INODE, false);
	98	set_nat_flag(ne, HAS_LAST_FSYNC, true);
	99	}
	100
39a53e0c JK	101	static inline void node_info_from_raw_nat(struct node_info *ni,
	102	struct f2fs_nat_entry *raw_ne)
	103	{
	104	ni->ino = le32_to_cpu(raw_ne->ino);
	105	ni->blk_addr = le32_to_cpu(raw_ne->block_addr);
	106	ni->version = raw_ne->version;
	107	}
	108
94dac22e CY	109	static inline void raw_nat_from_node_info(struct f2fs_nat_entry *raw_ne,
	110	struct node_info *ni)
	111	{
	112	raw_ne->ino = cpu_to_le32(ni->ino);
	113	raw_ne->block_addr = cpu_to_le32(ni->blk_addr);
	114	raw_ne->version = ni->version;
	115	}
	116
6fb03f3a	117	enum mem_type {
cdfc41c1	118	FREE_NIDS, /* indicates the free nid list */
6fb03f3a	119	NAT_ENTRIES, /* indicates the cached nat entry */
e5e7ea3c JK	120	DIRTY_DENTS, /* indicates dirty dentry pages */
e5e7ea3c JK	121	INO_ENTRIES, /* indicates inode entries */
1e84371f	122	BASE_CHECK, /* check kernel status */
cdfc41c1 JK	123	};
cdfc41c1 JK	124
aec71382	125	struct nat_entry_set {
309cc2b6	126	struct list_head set_list; /* link with other nat sets */
aec71382	127	struct list_head entry_list; /* link with dirty nat entries */
309cc2b6	128	nid_t set; /* set number*/
aec71382 CY	129	unsigned int entry_cnt; /* the # of nat entries in set */
	130	};
	131
39a53e0c JK	132	/*
	133	* For free nid mangement
	134	*/
	135	enum nid_state {
	136	NID_NEW, /* newly added to free nid list */
	137	NID_ALLOC /* it is allocated */
	138	};
	139
	140	struct free_nid {
	141	struct list_head list; /* for free node id list */
	142	nid_t nid; /* node id */
	143	int state; /* in use or not: NID_NEW or NID_ALLOC */
	144	};
	145
120c2cba	146	static inline void next_free_nid(struct f2fs_sb_info sbi, nid_t nid)
39a53e0c JK	147	{
	148	struct f2fs_nm_info *nm_i = NM_I(sbi);
	149	struct free_nid *fnid;
	150
39a53e0c	151	spin_lock(&nm_i->free_nid_list_lock);
c6e48930 HY	152	if (nm_i->fcnt <= 0) {
c6e48930 HY	153	spin_unlock(&nm_i->free_nid_list_lock);
120c2cba	154	return;
c6e48930	155	}
39a53e0c JK	156	fnid = list_entry(nm_i->free_nid_list.next, struct free_nid, list);
	157	*nid = fnid->nid;
	158	spin_unlock(&nm_i->free_nid_list_lock);
39a53e0c JK	159	}
	160
	161	/*
	162	* inline functions
	163	*/
	164	static inline void get_nat_bitmap(struct f2fs_sb_info sbi, void addr)
	165	{
	166	struct f2fs_nm_info *nm_i = NM_I(sbi);
	167	memcpy(addr, nm_i->nat_bitmap, nm_i->bitmap_size);
	168	}
	169
	170	static inline pgoff_t current_nat_addr(struct f2fs_sb_info *sbi, nid_t start)
	171	{
	172	struct f2fs_nm_info *nm_i = NM_I(sbi);
	173	pgoff_t block_off;
	174	pgoff_t block_addr;
	175	int seg_off;
	176
	177	block_off = NAT_BLOCK_OFFSET(start);
	178	seg_off = block_off >> sbi->log_blocks_per_seg;
	179
	180	block_addr = (pgoff_t)(nm_i->nat_blkaddr +
	181	(seg_off << sbi->log_blocks_per_seg << 1) +
	182	(block_off & ((1 << sbi->log_blocks_per_seg) - 1)));
	183
	184	if (f2fs_test_bit(block_off, nm_i->nat_bitmap))
	185	block_addr += sbi->blocks_per_seg;
	186
	187	return block_addr;
	188	}
	189
	190	static inline pgoff_t next_nat_addr(struct f2fs_sb_info *sbi,
	191	pgoff_t block_addr)
	192	{
	193	struct f2fs_nm_info *nm_i = NM_I(sbi);
	194
	195	block_addr -= nm_i->nat_blkaddr;
	196	if ((block_addr >> sbi->log_blocks_per_seg) % 2)
	197	block_addr -= sbi->blocks_per_seg;
	198	else
	199	block_addr += sbi->blocks_per_seg;
	200
	201	return block_addr + nm_i->nat_blkaddr;
	202	}
	203
	204	static inline void set_to_next_nat(struct f2fs_nm_info *nm_i, nid_t start_nid)
	205	{
	206	unsigned int block_off = NAT_BLOCK_OFFSET(start_nid);
	207
c6ac4c0e	208	f2fs_change_bit(block_off, nm_i->nat_bitmap);
39a53e0c JK	209	}
	210
	211	static inline void fill_node_footer(struct page *page, nid_t nid,
	212	nid_t ino, unsigned int ofs, bool reset)
	213	{
45590710	214	struct f2fs_node *rn = F2FS_NODE(page);
09eb483e JK	215	unsigned int old_flag = 0;
09eb483e JK	216
39a53e0c JK	217	if (reset)
39a53e0c JK	218	memset(rn, 0, sizeof(*rn));
09eb483e JK	219	else
	220	old_flag = le32_to_cpu(rn->footer.flag);
	221
39a53e0c JK	222	rn->footer.nid = cpu_to_le32(nid);
39a53e0c JK	223	rn->footer.ino = cpu_to_le32(ino);
09eb483e JK	224
	225	/* should remain old flag bits such as COLD_BIT_SHIFT */
	226	rn->footer.flag = cpu_to_le32((ofs << OFFSET_BIT_SHIFT) \|
	227	(old_flag & OFFSET_BIT_MASK));
39a53e0c JK	228	}
	229
	230	static inline void copy_node_footer(struct page dst, struct page src)
	231	{
45590710 GZ	232	struct f2fs_node *src_rn = F2FS_NODE(src);
45590710 GZ	233	struct f2fs_node *dst_rn = F2FS_NODE(dst);
39a53e0c JK	234	memcpy(&dst_rn->footer, &src_rn->footer, sizeof(struct node_footer));
	235	}
	236
	237	static inline void fill_node_footer_blkaddr(struct page *page, block_t blkaddr)
	238	{
4081363f	239	struct f2fs_checkpoint *ckpt = F2FS_CKPT(F2FS_P_SB(page));
45590710 GZ	240	struct f2fs_node *rn = F2FS_NODE(page);
45590710 GZ	241
39a53e0c	242	rn->footer.cp_ver = ckpt->checkpoint_ver;
25ca923b	243	rn->footer.next_blkaddr = cpu_to_le32(blkaddr);
39a53e0c JK	244	}
	245
	246	static inline nid_t ino_of_node(struct page *node_page)
	247	{
45590710	248	struct f2fs_node *rn = F2FS_NODE(node_page);
39a53e0c JK	249	return le32_to_cpu(rn->footer.ino);
	250	}
	251
	252	static inline nid_t nid_of_node(struct page *node_page)
	253	{
45590710	254	struct f2fs_node *rn = F2FS_NODE(node_page);
39a53e0c JK	255	return le32_to_cpu(rn->footer.nid);
	256	}
	257
	258	static inline unsigned int ofs_of_node(struct page *node_page)
	259	{
45590710	260	struct f2fs_node *rn = F2FS_NODE(node_page);
39a53e0c JK	261	unsigned flag = le32_to_cpu(rn->footer.flag);
	262	return flag >> OFFSET_BIT_SHIFT;
	263	}
	264
	265	static inline unsigned long long cpver_of_node(struct page *node_page)
	266	{
45590710	267	struct f2fs_node *rn = F2FS_NODE(node_page);
39a53e0c JK	268	return le64_to_cpu(rn->footer.cp_ver);
	269	}
	270
	271	static inline block_t next_blkaddr_of_node(struct page *node_page)
	272	{
45590710	273	struct f2fs_node *rn = F2FS_NODE(node_page);
39a53e0c JK	274	return le32_to_cpu(rn->footer.next_blkaddr);
	275	}
	276
	277	/*
	278	* f2fs assigns the following node offsets described as (num).
	279	* N = NIDS_PER_BLOCK
	280	*
	281	* Inode block (0)
	282	* \|- direct node (1)
	283	* \|- direct node (2)
	284	* \|- indirect node (3)
	285	* \| `- direct node (4 => 4 + N - 1)
	286	* \|- indirect node (4 + N)
	287	* \| `- direct node (5 + N => 5 + 2N - 1)
	288	* `- double indirect node (5 + 2N)
	289	* `- indirect node (6 + 2N)
4f4124d0 CY	290	* `- direct node
	291	* ......
	292	* `- indirect node ((6 + 2N) + x(N + 1))
	293	* `- direct node
	294	* ......
	295	* `- indirect node ((6 + 2N) + (N - 1)(N + 1))
	296	* `- direct node
39a53e0c JK	297	*/
	298	static inline bool IS_DNODE(struct page *node_page)
	299	{
	300	unsigned int ofs = ofs_of_node(node_page);
dbe6a5ff	301
4bc8e9bc	302	if (f2fs_has_xattr_block(ofs))
dbe6a5ff JK	303	return false;
dbe6a5ff JK	304
39a53e0c JK	305	if (ofs == 3 \|\| ofs == 4 + NIDS_PER_BLOCK \|\|
	306	ofs == 5 + 2 * NIDS_PER_BLOCK)
	307	return false;
	308	if (ofs >= 6 + 2 * NIDS_PER_BLOCK) {
	309	ofs -= 6 + 2 * NIDS_PER_BLOCK;
3315101f	310	if (!((long int)ofs % (NIDS_PER_BLOCK + 1)))
39a53e0c JK	311	return false;
	312	}
	313	return true;
	314	}
	315
	316	static inline void set_nid(struct page *p, int off, nid_t nid, bool i)
	317	{
45590710	318	struct f2fs_node *rn = F2FS_NODE(p);
39a53e0c	319
54b591df	320	f2fs_wait_on_page_writeback(p, NODE);
39a53e0c JK	321
	322	if (i)
	323	rn->i.i_nid[off - NODE_DIR1_BLOCK] = cpu_to_le32(nid);
	324	else
	325	rn->in.nid[off] = cpu_to_le32(nid);
	326	set_page_dirty(p);
	327	}
	328
	329	static inline nid_t get_nid(struct page *p, int off, bool i)
	330	{
45590710 GZ	331	struct f2fs_node *rn = F2FS_NODE(p);
45590710 GZ	332
39a53e0c JK	333	if (i)
	334	return le32_to_cpu(rn->i.i_nid[off - NODE_DIR1_BLOCK]);
	335	return le32_to_cpu(rn->in.nid[off]);
	336	}
	337
	338	/*
	339	* Coldness identification:
	340	* - Mark cold files in f2fs_inode_info
	341	* - Mark cold node blocks in their node footer
	342	* - Mark cold data pages in page cache
	343	*/
a06a2416	344	static inline int is_file(struct inode *inode, int type)
39a53e0c	345	{
a06a2416	346	return F2FS_I(inode)->i_advise & type;
39a53e0c JK	347	}
39a53e0c JK	348
a06a2416	349	static inline void set_file(struct inode *inode, int type)
953a3e27	350	{
a06a2416	351	F2FS_I(inode)->i_advise \|= type;
953a3e27 JK	352	}
953a3e27 JK	353
354a3399 JK	354	static inline void clear_file(struct inode *inode, int type)
	355	{
	356	F2FS_I(inode)->i_advise &= ~type;
	357	}
	358
	359	#define file_is_cold(inode) is_file(inode, FADVISE_COLD_BIT)
	360	#define file_wrong_pino(inode) is_file(inode, FADVISE_LOST_PINO_BIT)
	361	#define file_set_cold(inode) set_file(inode, FADVISE_COLD_BIT)
	362	#define file_lost_pino(inode) set_file(inode, FADVISE_LOST_PINO_BIT)
	363	#define file_clear_cold(inode) clear_file(inode, FADVISE_COLD_BIT)
	364	#define file_got_pino(inode) clear_file(inode, FADVISE_LOST_PINO_BIT)
953a3e27	365
39a53e0c JK	366	static inline int is_cold_data(struct page *page)
	367	{
	368	return PageChecked(page);
	369	}
	370
	371	static inline void set_cold_data(struct page *page)
	372	{
	373	SetPageChecked(page);
	374	}
	375
	376	static inline void clear_cold_data(struct page *page)
	377	{
	378	ClearPageChecked(page);
	379	}
	380
a06a2416	381	static inline int is_node(struct page *page, int type)
39a53e0c	382	{
45590710	383	struct f2fs_node *rn = F2FS_NODE(page);
a06a2416	384	return le32_to_cpu(rn->footer.flag) & (1 << type);
39a53e0c JK	385	}
39a53e0c JK	386
a06a2416 NJ	387	#define is_cold_node(page) is_node(page, COLD_BIT_SHIFT)
	388	#define is_fsync_dnode(page) is_node(page, FSYNC_BIT_SHIFT)
	389	#define is_dent_dnode(page) is_node(page, DENT_BIT_SHIFT)
39a53e0c JK	390
	391	static inline void set_cold_node(struct inode inode, struct page page)
	392	{
45590710	393	struct f2fs_node *rn = F2FS_NODE(page);
39a53e0c JK	394	unsigned int flag = le32_to_cpu(rn->footer.flag);
	395
	396	if (S_ISDIR(inode->i_mode))
	397	flag &= ~(0x1 << COLD_BIT_SHIFT);
	398	else
	399	flag \|= (0x1 << COLD_BIT_SHIFT);
	400	rn->footer.flag = cpu_to_le32(flag);
	401	}
	402
a06a2416	403	static inline void set_mark(struct page *page, int mark, int type)
39a53e0c	404	{
45590710	405	struct f2fs_node *rn = F2FS_NODE(page);
39a53e0c JK	406	unsigned int flag = le32_to_cpu(rn->footer.flag);
39a53e0c JK	407	if (mark)
a06a2416	408	flag \|= (0x1 << type);
39a53e0c	409	else
a06a2416	410	flag &= ~(0x1 << type);
39a53e0c JK	411	rn->footer.flag = cpu_to_le32(flag);
39a53e0c JK	412	}
a06a2416 NJ	413	#define set_dentry_mark(page, mark) set_mark(page, mark, DENT_BIT_SHIFT)
a06a2416 NJ	414	#define set_fsync_mark(page, mark) set_mark(page, mark, FSYNC_BIT_SHIFT)